Shuttle



Se t. 30, 1930. E, FQ L R 1,776,896

SHUTTLE Fild D00. 1, 1927 zzz. n

Patented Sept.-3(i, 1930. v V

EMIL YE. FULLER, F woonsocxn'r, Races ISLAND, Assreivoiz. TOSHAMBQWSHUTTLE H COMPANY, or woolvsooxnar,"nnonn'lsL uvn,A-conronarion or;nrronn ISLAND].

' SHUTTLE. 1

Application and samba i, 1927." seria no. 236,940}

Tlhe present invention relates toan im-. provement in shuttles,andmoreparticularly to automatic weft replenishing shuttles providedwithfriction tension devices;

In weaving silk and rayon the extreme elasticity ofthe yarn requiresprovision to prevent loops forming which sometimes cause yarn breakage.

r The object of the present invention is to produce an improved formofthread block for automatic weft replenishing shuttles'having a threadtension contributing to the control of the thread in running off fromthe shuttle.

The invention consists in the shuttle herein afterdescribed andparticularly defined 1n the claim.

In the accompanying drawingsillustrating the preferred form of theinvention,Fig. 1 is a plan of the thread block end of a self-threadingshuttle embodying the present invention;

v Fig. 2 is a front elevation ot the same; Fig. 3' r r is a frontelevation of the thread block ,Fig.

. (his a front end elevation of the thread block;

Fig. 5 is a rear elevation of the threadblock; Fig. 6 is a rear endelevation of the thread block; Fig. 7 is a longitudinal vertical sectiontaken on the line 7. 7, Fig. l; and Fig. 8

is a transverse vertical section takenon'the tion is described asfollows: The shuttle body line 8+8, Fig. 3.

The illustrated embodiment of the inven- 10 has the usual bobbin recess11 provided, in the case of rayon or silk, with cony fur. The threadblock 12 is received in the thread block recess in the shuttle, and ithasa table 13, a beali 149a thread passage '15 and eye 16, all'of whichoccupy the same positions and perform th'e same functions as is usualthis class of shuttles. So far as the invention is concerned, anyform ofshuttlehavingthese. general characterlstics 1s available for use inconnection with thepresent invention.

The block is provided with a pin'17 located in the passageway from thethread. passage tothc shuttle eye, and projecting'downward in aninclined direction, as shown in Fig. 3, the inclination belng such as topermit easy passage of the thread beyond the pm, but to prevent passageoutward from it. g Located in the body of thefthread block is a :tensionslot 18, which reeeives the tension 7 plates held together. by springpressure. The

lower tension plate consists of'a flatplate with rounded side edges and,a curved lip 21 at the entering end. which projects-into ajhole 22 inthe lowerpart 23 ofthe thread block.

The other end of this tensionp'iece 20-is provided with alhole whichreceives thereduced end 24 of the screw 25, screwed into the lower';part 23 of the thread block. fThe upper tension'jmember 26 is asiinilar plate to the first. w th rounded edgesand'an'iqoturned lip 27,which projects into thOmhOlG 2'8 in the under side. of the upper part 29ofthe thread block.

The otherend of the upper tension plate 26 is provided with a hole whichreceives the end24 of the screw 25. Aspring-pressed pin is provided witha head which rests on'the upper tensionplate 26. This pin is encircledby a spring received in the adjusting screw 31, the upper endofw-hichextends to the top of the thread blockand aifords means for varying thepressure which the spring exerts upon e the uppertension member,pressing it against the thread supported by the lower tension member. ii

' The thread block is also provided I an enamel pin 321ocated near theinner end tof the tension device, see' Fig. 7.'-' Thelshuttle threadsupin the usual manner? On thefirst shot of the shuttleto the left. asviewed in Fig. 1, the thread enters the thread'passage and descends intothe recess 34 of 'the shuttle in Fig- 1, extending through'thethreadfpas sage touthe glass rod 32, thenceat an angle nose, and on theneXt shot in the opposite i between the'membe'rs of the tension deviceto ,the shuttle eye, where itQis discharged be tween the usual porcelainwear pins-33 of the shuttle.

The tension applied by the device to the thread may be adjusted by meansof the screw 31 to a greater or lesser amount, depending upon thecharacter of the yarn being woven.

In some common forms of tension devices found in self-threadingshuttles, the entrance of the thread into the thread passage is resistedby the requirement that the thread should at the same time enter betweenthe members of the tension device. In the present construction there isno impediment to the free entrance of the thread into the thread passageof the thread block, after which, when the thread is thoroughly caughtby the block, the thread will be drawn into the tension device. Thethread is prevented from escape from the tension device by the pin inthe passageway leading from the thread passage to the shuttle eye, andit is drawn over the glass pin at the point where its direction ofmotion changes from that in line with the thread passage to thedirection'in which it passes through the shuttle eye, so it is therebyguided over good-wearing parts'in its passage from the bobbin to theeye, and prevented from any accidental escape therefrom.

The tension members themselves are identical in form, and this conducesto cheapness and facility of manufacture. Furthermore, when worn to anextent requiring replacement, this is easily accomplished by taking thethread block out of the shuttle and removing first the screw 25, whichreleases the one pair of ends of the tension members, and thenwithdrawing the pin 17, which is held in place by friction in the holein which it is supported, whereupon the two tension members'may beturned from the position which they normally occupy in the shuttle, to apositi on extending outwardly therefrom, with their upturned lips 21 and27 still remaining in the holes 22 and 2S, whereupon, by tipping theupper tension member upward, it may be taken out, and similarly, bytipping the member downward, the latter may be removed and new onesinserted.

Having thusdescribed the invention, what is claimed is: i

A shuttle having a thread block provided with a thread passage, atension device located parallel to the thread passage and in front ofthe same in the line of the lead of the thread from the thread passageto the shuttle e e such tension device com )risim two hori-' zontaltension members, each provided with upturned side and front end lips,and with holes at the ends opposite the upturned lips,

a pin in the shuttle block passing through theholes in the tensionmembers to hold these ends in place, and the block being provided withpositioning holes to receive the upturned lips of the other ends of thetension members. i

In testimony whereof I have signed my name to this specification.

EMILE. FULLER.

